Loach minnow (Tiaroga cobitis)
Where Listed: WHEREVER FOUND
A small member of the minnow family with an elongated body that is flattened ventrally. There are eight rays in the dorsal fin and seven in the anal fin. The lateral line has approximately 65 scales. Coloration tends to be olivaceous background, with a lot of blotches in darker pigments. There are whitish spots at the origin and insertion of the dorsal fin and dorsal and ventral portions of the caudal fin base. A black, basicaudal spot is usually present. Breeding males have bright red-orange coloration at the bases of the paired fins and on the adjacent body, on the base of the caudal lobe, about the mouth, near the upper portion of the gill opening, and often on the abdomen. Females in the breeding season become yellowish on the fins and lower body.
- States/US Territories in which the Loach minnow, Wherever found is known to or is believed to occur: Arizona , New Mexico
- US Counties in which the Loach minnow, Wherever found is known to or is believed to occur: View All
- Countries in which the the Loach minnow, Wherever found is known to occur: Mexico
- Additional species information
|Status||Date Listed||Lead Region||Where Listed|
|10/28/1986||Southwest Region (Region 2)||Wherever found|
» Federal Register Documents
|10/28/1986||51 FR 39468 39478||Determination of Thr. Status for Loach Minnow; 51 FR 39468-39478|
|Date||Title||Plan Action Status||Plan Status|
|09/30/1991||Loach Minnow Recovery Plan||View Implementation Progress||Final|
|Date||Citation Page||Title||Document Type|
|03/29/2010||75 FR 15454 15456||5-Year Status Reviews of 14 Southwestern Species||
|04/23/2007||72 FR 20134 20136||5-Year Reviews of 24 Southwestern Species||
|08/31/2012||5 year review for Loach minnow - 2012|
» Critical Habitat
To learn more about critical habitat please see http://ecos.fws.gov/crithab
» Conservation Plans
|HCP Plan Summaries|
|Salt River Project Horseshoe and Bartlett HCP|
|SHA Plan Summaries|
|Paterson, Thomas W. and Caroline H. (Spur Ranch)|
» Life History
Turbulent, rocky riffles of mainstream rivers and tributaries at or less than 2,200 meters in elevation. Habitat that is occupied is relatively shallow, has a moderate to swift current, with gravel to cobble dominated substrates. The depth, velocity, and substrate of occupied habitats can, and is expected to, vary seasonally and geographically.
Opportunistic, benthic insectivores, largely deriving their food supplies from among riffle-dwelling, larval flying insects (mayflies, black flies, and members of the Chironomidae family), larva of other aquatic insect groups (stoneflies, caddisflies), and occasionally pupae.
Movement / Home Range
The loach minnow was historically endemic to the Gila River Basin of Arizona, New Mexico, and Sonora, Mexico. Currently persists in Arizona in the White River of Gila County, the North and East Forks of the White River in Navajo County, Aravaipa Creek in Graham and Pinal Counties, San Francisco and Blue Rivers and Campbell Blue Creek in Greenlee County. In New Mexico, the species could be found in the upper Gila River, including the East, Middle and West forks of Grant and Catron counties, the San Francisco and Tularosa Rivers in Catron County, and the lowermost Whitewater Creek and Dry Blue Creek in Catron County
Loach minnow will first spawn at age one in late winter-early spring (Aravaipa Creek), and from late March into early June (New Mexico). Spawning is in the same riffles occupied by adults during the nonrepoductive season, where sex ratios appear approximately equal. Eggs are deposited on the underside of flattened rocks; cavities are usually open on the downstream side while the upstream portion of the rock is embedded in the substrate. The eggs have an adhesive quality to them.
Threats to the minnow are predominantly water use based, and the alterations to stream habitat. These include impoundments, dewatering, non-native species, and livestock grazing.
» Other Resources
NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.